\documentclass[12pt, a4paper]{report}

% --- Packages ---
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[left=3cm, right=2.5cm, top=3cm, bottom=2.5cm]{geometry}
\usepackage{graphicx}
\usepackage{setspace}
\usepackage{amsmath, amssymb}
\usepackage{titlesec}
\usepackage{fancyhdr}
\usepackage{booktabs}
\usepackage{caption}
\usepackage[hidelinks]{hyperref}
\usepackage[nottoc]{tocbibind}
\usepackage{datetime}

\newdateformat{monthyeardate}{%
  \monthname[\THEMONTH] \THEYEAR}

\setlength{\parindent}{1.25cm}
\onehalfspacing

\titleformat{\chapter}[display]
  {\normalfont\bfseries\centering}{\chaptertitlename\ \thechapter}{20pt}{\Large}

% --- Graphic Path ---
% Place all images in an 'images' folder
\graphicspath{ {./images/} }

\begin{document}

\begin{titlepage}
    \centering
    
    \includegraphics[width=4cm]{logo.png} 
   
    \vspace{1.5cm}
    
    {\Large \textbf{ANKARA UNIVERSITY}} \\
    \vspace{0.2cm}
    {\Large \textbf{FACULTY OF $\ldots$}} \\
    \vspace{0.2cm}
    {\Large \textbf{DEPARTMENT OF $\ldots$}}
    
    \vspace{2cm}
    
    {\Large \textbf{$\ldots$ THESIS}}
    
    \vspace{2cm}
    
    {\Large \textbf{THESIS TITLE}}
    
    \vspace{2cm}
    
    {\Large \textbf{Your NAME}\\
    \textbf{[Your ID]}}
    
    \vspace{2cm}
    
    {\Large \textbf{Supervisor: \ldots}}
    
    \vfill
    
    {\Large \textbf{ANKARA}\\
    \textbf{\monthyeardate \today}}
    
\end{titlepage}

\pagenumbering{roman} 

% --- Abstract ---
\chapter*{ABSTRACT}
\addcontentsline{toc}{chapter}{ABSTRACT}

% --- Preface/Ack ---
\chapter*{PREFACE AND ACKNOWLEDGMENTS}
\addcontentsline{toc}{chapter}{PREFACE AND ACKNOWLEDGMENTS}

% --- Table of Contents ---
\tableofcontents
\listoffigures
\listoftables

% --- Symbols/Abbreviations ---
\chapter*{INDEX OF SYMBOLS AND ABBREVIATIONS}
\addcontentsline{toc}{chapter}{INDEX OF SYMBOLS AND ABBREVIATIONS}
\begin{tabbing}
    \hspace{3cm} \= \kill
    
\end{tabbing}

\newpage
\pagenumbering{arabic}

% --- Chapter 1 ---
\chapter{Your Chapter I}
\section{Your Section I}
\subsection{Your Subsection I}

% --- Other Chapters --- 

% --- Bibliography ---
\begin{thebibliography}{99}
\end{thebibliography}

% --- Appendix ---
%\appendix
%\chapter{}

\end{document}